1. Battery Vol：3.7V, Battery capacity: 1800mAh ,Please make sure your RC Drone Battery are the same Voltage and same connector with the picture shows before you buy it. 2. Plug Type: JST Connector. 3. Function: As a spare battery for a your RC Drone and can extend the playing time. 4. High quality and safe to use,safe in normal use,Easy operation, battery can be charged anytime without the need to fully discharge. 5. Easy to plug in and out.Battery Size: 57*29*10 mm ( L x W x H ). Note: 1.Please turn off the power switch and unplug the battery connector after use 2.DO NOT Attempt to open ,disassemble the battery pack 3.DO NOT Crush,puncture,short external contacts or dispose of in the fire or water 4.DO NOT Expose to temperature above 60℃ 5.DO NOT Overcharging and over-discharging.